An ACT government spokeswoman has confirmed the territory's public service will write to the Australian Human Rights Commission to propose a limited waiver that "that extends to confidential submissions made by former and current employees to the inquiry about sexual harassment matters or incidents".

"This is in line with recommendations from the Commonwealth Sex Discrimination Commissioner and the approach of the NSW and Queensland governments," the spokeswoman said.

The decision by the ACT government means public servants in federal agencies are so far the only public servants that must first apply for a waiver before making a submission to the inquiry.

The national inquiry into workplace sexual harassment was announced by Sex Discrimination Commissioner Kate Jenkins last year, following the #MeToo movement and a survey which showed the prevalence of sexual harassment in the workplace and reluctance to speak up about such issues.

In November last year Ms Jenkins wrote to 120 chief executives across the country, asking them to release statements allowing employees and former employees to give evidence to the inquiry despite having signed non-disclosure agreements.

Some major private sector employers have signed up, as have the NSW and Queensland governments. Many private sector employers haven't made statements allowing their employees to give evidence to the inquiry, which the Sex Discrimination Commissioner is concerned is a barrier to people's involvement.

The inquiry doesn't seek to prosecute individual cases, but to help employers find solutions address workplace sexual harassment.

"The ACT Public Service wants to support employees to make a submission to the National Inquiry into Sexual Harassment in Australian Workplaces conducted by the Australian Human Rights Commission," the ACT government spokeswoman said.

Submissions to the inquiry have been extended and now close on February 28.